Oryza Sativa (Rice) Lees Extract is derived from the fermentation residue (lees) of rice, often a byproduct of sake or rice wine production. It is used in skincare for its antioxidant, moisturizing, and skin-brightening properties attributed to amino acids, peptides, and polysaccharides.
| Reported effect | How often | Notes |
|---|---|---|
Contact irritation (mild redness or stinging) | Rare | Generally well tolerated; mild irritation possible in sensitive individuals. |
Allergic contact dermatitis | Rare | Rice-derived proteins may trigger sensitization in individuals with rice or grain allergies. |
Fermentation-related sensitivity | Very rare | Reactions to fermentation byproducts have been occasionally noted but are poorly documented. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.